J/A+A/487/475ivo://CDS.VizieR/J/A+A/487/475doi:10.26093/cds/vizier.34870475CDSPapadakis I.E.Chatzopoulos E.Athanasiadis D.Markowitz A.,Georgantopoulos I.2017-09-19T14:21:22Z2008-09-21T12:10:21ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesredshiftedWe present the results from a detailed X-ray variability analysis of 66 AGN in the Lockman Hole, which have optical spectroscopic identifications. We compare, quantitatively, their variability properties with the properties of local AGN, and we study the "variability - luminosity" relation as a function of redshift, and the "variability - redshift" relation in two luminosity bins. We use archival data from the last 10 XMM-Newton observations of the Lockman Hole field to extract light curves in the rest frame, 2-10keV band. We use the "normalized excess variance" to quantify the variability amplitude. Using the latest results regarding the AGN power spectral shape and its dependence on black hole mass and accretion rate, we are able to compute model "variability - luminosity" curves, which we compare with the relations we observe. When we consider all the sources in our sample, we find that their variability amplitude decreases with increasing redshift and luminosity.2008A&A...487..475Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/487/475CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/329/482 : ROSAT Deep Survey in the Lockman Hole (Hasinger+, 1998)J/PASJ/53/445 : ASCA Deep survey in Lockman Hole Field (Ishisaki+, 2001)J/A+A/393/425 : Spectral analysis of Lockman Hole (Mainieri+, 2002)J/A+A/398/901 : VLA survey at 6 cm in the Lockman Hole (Ciliegi+, 2003)J/A+A/413/843 : Far IR survey in the Lockman Hole (Kawara+, 2004)J/A+A/427/23 : 14.3um survey in the Lockman Hole (Fadda+, 2004)J/A+A/427/773 : ISOCAM 14.3um Deep Survey in Lockman Hole (Rodighiero+, 2004)J/AJ/128/1501 : CLASXS: X-ray catalog (Yang+, 2004)J/A+A/434/801 : X-ray sources near Lockman Hole (Zappacosta+, 2005)J/A+A/444/79 : XMM observations of Lockman Hole brightest AGNs (Mateos+, 2005)J/A+A/473/105 : Lockman Hole AGN variability with XMM (Mateos+, 2007)J/A+A/479/283 : XMM observations of the Lockman Hole (Brunner+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/487/475https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/487/475http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/487/475https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/487/475https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/487/475http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/487/475GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/487/475/table2 (IDs, redshift, spectral and variability properties of AGN that we study in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/487/475/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/487/475/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/487/475/table2?GETtext/xml+votable180.050000true163.410416757.61540830.0055555555555555566/6069https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/487/475?format=asciiX-rayOpticaldefaultJ/A+A/487/475/table2IDs, redshift, spectral and variability properties of AGN that we study in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[MBC2005]Source designation (1)meta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatsnxsNormalized excess variancestat.variancefloate_snxsError of snxsstat.errorfloatlogsnxsLogarithm of the snxsstat.variancefloate_logsnxsError of the logarithm of snxsstat.errorfloatchi2Chi-square valuestat.valuefloatDOFDegrees of Freedomstat.fit.dofintVar[V NV] Variable/Non-Variable source flagmeta.code;src.varcharLxLogarithm of luminosity in the [2-10]keV rest-frame band (1)phys.luminosity;em.X-rayfloatGammaPower law spectral slope (1)arith.grad;spect.resolutionfloatInstInstrument(s) used in each caseinstr.setupcharSimbadSimbad column added by the CDSmeta.ref.urlchar